Package for transporting paper sheets



April 1960 L. s. PEARSON 2,932,389

PACI AGE FOR TRANSPORT EEEEEEEEEEEE TS Aprl 12, 1960 L. s. PEARSONPACKAGE FOR TRANSPORTING PAPER SHEETS Filed Sept. 16, 1957 3Sheets-Sheet 2 INVENTOR %me J w/&m

. ATTORNEY5 April 12, 1960 L. s. PEARSON Filed Sept. 16. 1957 W\ ;M N Ww Hi w III N s NI W NN IM!! PACKAGE FOR TRANSPORTING PAPER SHEETS LeslieS. Pearson, Portland, Maine, assignor to S. D. Warren Company, Boston,Mass., a corporation of Massacinsetts Application September 16, 1957,Serial No. 684,357 Clains; (Cl. 206-60) This invention relates generallyto a package for stacks of paper sheets and to the method of forming thesame, and more particularly to the method of packaging a stack of papersheets upon a wooden transport skid or pallet by means of fouroverlapping package corner sections.

In the paper manufacturing industry the packaging of stacks of largerpaper sheets for shipping presents a rather serious problem due to thevarious types and sizes of containers which must be kept in stock inaccordance with the various quantities and sizes of sheets of thecustomers orders. Due to the large masses and dimensions of the variouspaper sheet stacks, the wrapping of the sheets with a protective coverand the securing of the stacks to suitable transport skids presentsrather diicult problems and great care must be 'maintained to avoiddamaging the paper sheets. The present invention was developed toprovide an improved method for Packaging stacks of paper sheets by theuse of overlapping corner sections formed from standard pre-cut blankswherein numerous sizes of paper sheet stacks may be packaged with onlyone standard size of wrapper section( Thus the primary object of myinvention is to provide a method of packagng various sizes of papersheet stacks upon a transport skid without damaging the paper sheets.

A further object of my invention is to provide a method of packaging astack of paper sheets. upon a transport pallets by means of fouroverlapping package corner sections in which the extent of overlappingof the sections is determined by the size of the paper stack.

Another object of my invention is to package a stack of paper sheetsupon a transport skid by means of four overlapping corner sections whichare mutually secured at their overlapping portions by a pressuresensitive adhesive to form a rigid container, which container is thenSecured at its lower extremities to the transport skid to form a rigidpackage. i

A further object of my invention relates to the method of packaging astack of paper sheets positioned on a transport skid wherein fouroverlapping package corner sections are placed at the corners of thestack, said sections having tab portions which extend onto the top ofthe stack, adhesively securing the overlapping corner sections of theskid together to form a rigid container, securing a top piece to the tabportions of the sections under pressure to compress the 'paper sheetsupon the transport skid, and simultaneously securing the lowerextremities of the container to the skid to form a rigid package of thepaper sheets.

'Still another object of my invention is to provide a package of papersheets having four overlapping corner sections, a top member, and abottom transport skid member to which the corner sections are Secured.

Other objects and advantages of my invention will become more apparentfrom a study of the following specification when considered inconjunction with the accompanying drawings, in which:

Fg. 1 is a perspective View of the stack of paper posi- .tioned upon thesupporting skid;

States Patent' O Ice 'Figs. 2 and 3 are perspective views of theassembly steps of placing the overlapping corner panels upon the stack;

Fig. 4 is a perspective view of the package with the four corner panelsand the top member positioned in place;

Fig. 5 is a perspective view of the finished package with the lowerportions of the corner panels stapled to the supporting skid; and

Fig. 6 is a view of a corner panel blank.

Referring now more particularly to Fig. l, the stack 1 of standard papersheets is positioned upon the transport skid or pallet 2 which may be ofwood or other suitable inexpensive material. The skid consists of ahorizontal supporting base 3 supported a distance (on the order of 8inches) above the floor by depending vertical legs 4. The height of thepaper stack is on the order of 18 to 72 inches and the dimensions of thepaper sheets are on the order of 25 to 54 inches by 38 to 76 inches. Theweight of the paper load is on the order of 1300 to 4600 pounds. Thedimensions of the horizontal skid base 3 should approximately equal thedimensions of the paper sheets. If desired a layer 5 of heavy paper orthe like may be positioned intermediate the skid base 3 and the lowersurface of the paper stack to protect the lower stack sheets. A sheet 6of solid fibre board of approximately 140 pt. having dimensions whichare approximately the same as the paper sheets is positioned on top ofthe paper stack as shown in Fig. l.

While the sheet 6 could be of asphalt laminated corrudarnage to thepaper.

Referring now to Figs. 2 and 3, the corner panels 7, 8, 9 and 10 arefitted telescopically on the corners of the paper stack. These panelsare formed from a blank of oorrugated cardboard, as for example 275#test asphalt l aminated corrugated board. The panels are identical andthe following description of panel 7 in Fig. 6 applies to each of thepanels. sections 7a, 7b by means of a central vertical crease 7c.

Each section has a tap 7d, 7e at the upper portion there-' of connectedthereto along crease lines 7f, 7g. Slot 7h separates the tabs 7d, 7e. Toform the blank of Fig. 6

into the' corner configurations illustrated in Figs. 2 and` 3 the tabs7d and 7e are folded forwardly to the hori-.

zontal plane about crease line 7c to form a right angle with respect toeach other. The horizontal dimension of each of the sections 7a, 7b issomewhat greater than half the corresponding dimension of the papersheets so that the edge of the sections will overlap pas shown in Figs.2 and 3. A layer of pressure sensitive adhesive, such as a white lateXadhesive of high solid content and ready-to-use Vscosity emulsion isapplied between overlapping section edges as illustrated by layers 7sand 9s in Fig. 2. If desired, pressure sensitive adhesive may be appliedto the entire upper surface of sheet 6 so that the bent-over upper tabswill be firmly secured thereto. To obtain a successful adhesive-coatedsurface, the majority of adhesive solids should matt or stay on thesurface of the stock so that it will be possible to eifect asatisfiactory seal when the coated surfaces are pressed together. Thereshould. be some penetration of the adhesive into the corrugatedcardboard stock to provide an anchorage of the film into the fibers,which penetration will vary somewhat with denser or less absorbentstock. Chromium plated or rubber covered roller or brush application ofthe adhesive -s preferred since spraying of the adhesive will tend tooxidize the latex in the adhesive i 2,932,3s9* Patented Ap The panel 7is divided into two &932389 and ther'eby damage its cohesivecharacteristics. Bonding is acomplished by pressing together underprssure the overlapping portions of adjacent panels. Once the bond ismade, temperature will have no effect upon it and the bond will beeifective for a period of at least one year.

After the four corner panels have been positioned as shown in Fig. 3, alayer of pressure sensitive adhesive material is applied to the uppersur-faces of the assemblage and top panel 11 is pressed downwardly 'intofirm engagement with the upper surfaces of the inwardly bent tabs andthe exposed central portion of the cardboard sheet 6. The top panel 11is preferably also formed from an asphalt laminated corrugated boardmaterial and when bonded to the section flaps, serves to firmly maintainthe corner panels in place.

As the top panel 11 is pressed downwardly into engagement with theassemblage, the entire skid With its assembled components is compressed,and While held under pressure metal cleats, staples or nails 12 aredriven in the lower extremities of the corner panels to n'gidly securethe same to the horizontal base 3 of the skid 2.-

The top panel 11 has been thus firmly bonded into position 'and uponrelease of pressure a rigid paper package Secured to the skid has beenformed.

In order to assist in the securernent of the top layer 11 to theassemblage of Fig. 3 it has been found to be de'sirable to ceaseslightly the central portions of the tabs (as for example along creaselines 7' and 7j in Fig. 6) so that upon the application of the top layer11, the extremities of the tabs will be urged inwardly to efiect a firmengagement of the upper corners of the package with the paper sheetstack.

It will be readly apparent that the construction of the package inaccordance with my invention allows for considerable variation inpackage size with the use of only one standard size of corner panelpre-cut blanks. For paper sheets of smaller dimensions the degree ofoverlapping of the corner sections will be greater than the degree ofoverlapping with sheets of greater dimensions. With smaller stack ofpaper sheets the metal cleats 12 will be driven into the skid base 3 agreater distance above the lower extremeities of the corner panels thanin the case of greater stacks of sheets.

Hence it will be seen that the paper package according to my inventionprovides a quickly-assembled, rigid package made from relativelyinexpensive materials, which package may be subject to rough treatmentduring transport and storage without damage to the paper sheets. -Thenovel package affords a much improved and superior protective wrappcrfor sheet paper and when properly packaged and sealed under pressure inthe correct manner, mutual slippage and creasing of the sheets duringackaging, transport and storage is avoided.

While in accordance with the provisions of the statutes I haveillustrated and described the best form of embodiment of my invention'known to me, it will be apparent to those skilled in the art thatchanges may be made in the form of the apparatus described withoutdepartment from the spirit of my invention as set forth in the ppenddclaims.

I claim:

1. A package for transporting paper sheets which comprises a woodentransport pallet having a rectangular horizontal supporting surface, astack of paper sheets positioned on said pallet and having the samehorizontal dimensions thereof, right-angled package' corner sectionscontiguously position'ed at the vertical corners of the stack, each ofsaid corner sections having horizontal tab portions at the upperportions thereof folded over the horizontal upper edges of the stack,the horizontal dimensions of the legs of said corner section beinggreater than one half of the correspondng horizontal dimensions of thestack of paper sheets so that the edge and tab portions of adjacentcorners sections overlap, pressure-sensitive adhesive means securing theoverlapping edge and tab portions of adjacent sections to each other, ahorizontal top member having horizontal dimensions corresponding to thehorizontal dimensions of said stack of paper sheets, pressure-sensitiveadhesive means securing said horizontal top member to the upper surfacesof said corner section tab portions, said corner sections havingvertical dimensions greater than the height of the paper stack, andmetal cleat means driven laterally into the pallet though the lowerextremities of said corner sections to secure said sections to saidpallet.

2. A package as defined in claim 1 wherein each of the tab portions ofsaid corner sections is creased about a line parallel to and spaced fromthe associate'd horiz'ontal upper edge of the stack.

3. A package as defined in claim 1 and further including an auxliary topmember positioned intermediate the upper surface of the paper stack andthe lower surfaces of the horizontal tab 'portions of said cornersections, said auxiliary top member 'having horizontal dimensionscorresponding to the horizontal dimensions of said paper stack.

4. A package as defined in claim 3 wherein the lower surfaces of saidtabs are Secured to the upper surface of said auxiliary top member bypressure-sensitive adhesive means. y

i 5. A package as dened in claim 3 wherein said corner sections and saidtop members are formed from corrug'ated cardbo'ard blanks.

References Cited in the file of this patent UNITED STATES FATENTS818,257 Kennedy Apr. 17, 1906 2,4 28,44O Waters Oct. 7 1947 2,53 5,422Jones Dec. 26, 1950 2,567,267 Andrews Sept. 11, 1951 2,614-,689 MillerOct. 21, 1952 2,631,723 Ellsworth Mar. 17, 1953 2,675,123 Baird Apr. 13,1954 2.742,145 Blackburn et al. Apr. 17, 1955 FOREIGN PATENTS 484,727Great Britain May 10, 1938

